CONTENTS. XV 



Hencuuan, Annik p., & C. B. Davenport — Variations in Hooks of Statoblants in 



Pectinatella ma(jnifica :^87 



Stiasnt, G. — Development of Balanoglossus clavigerus 4!U) 



BouLENGER, C. L. — Structure of My zodomi da VM 



Masek, O. — Structure of Balanoglo88U8 ;)85 



Rotatoria. 



Martini, E. — Constancy of Elements i?i Hydatina 6!) 



Licks. K. — Neio Genus of Rotifer 294 



NiTARDY, E. — Male of Schizocerca homocerox 4IH 



RoussELET. C. F. — Rotif era of Devil's Lake 491 



Harring, H. K. — Synopsis of the Rotif era 4'.U 



Bryce, David — New Species of LdeUoid Rotif era 49"^ 



Kratzschmar. H. — Polymorphism of Anurasa aculeata Ehrhg 585 



Echinoderma. 



Becher, S. — Observations on Lab idoplax huskii 70 



Mortensen, Th. — Study of Asteronyx loveni 70 



MacBride, E. W. — Hybrid Larvae of Echinocardium cordatum and Echinus escu- 



lenfus 163 



Debaisieux, G. — Hybri(Hzation of Echinus Species 1H4 



Shearer. Cresswell, & others — Echiuoid Hyrbrids .. Iti5 



Gray, J. — Effect^ of Hypertonic Solutions on Fertilized Ova Ifjf) 



DoNCASTER, L., & J. Gray — Early Stages of Segmentation in Echinus Hybrids .. 165 



Plessner, Helmdth — Eyes of Starfish ^^87 



Horyold, D. A. GoNDOLFi — Study of Spit tang ids :^88 



Hawkins, H. L. — Structure of Echinocardium Test 493 



Clark, H. L. — Anatomy and Regeneration in Linchia 585 



Matusomoto, H. — Interesting New Ophiuroid 586 



Coelentera. 



Yatsu Naohide — Experiments on Ctenophore Ova 70 



Wietrzykowski, W. — Development of Lucernarians 71 



Douglas, Robert (the laie) — Limnocodium sowerbyi 1~ 



Annandale, Nklson — Fresh-water Medusa from Bombay Presidency 166 



Gravely, F. H , & S. P. Agharkar — Fresh-water Medusoidfrom Western India 166 



HiCKSON, S. J. — Genus Errina 166 



Matthews, Annie — Development of Alcyonium dig itatum 294 



LivowsKY, Fritz F. — Structure of Sidisia 388 



Chester, W. M. — Structure of Pseudo pi exaura crassa 493 



Ritchie, James — New British Commensal Hydroid 586 



Stechow, K. — Athecate Hydroid with a Leptomedusoid 586 



Poriiera. 



Kirkpatrick, R. — Melia and Monticulipora 72 



Annandale, Nelson — Sponges of Lake of Tiberias 495 



Protozoa. 



Weber, Georq — Peristomial Cilia '- 



Viewegkr. Tu. — Irritability of Infusorians .. .. : "2 



Cropper, J. W. — Spirochxt of Earthworm ''^ 



